code: def test_toy_compare_survival(inputs, expectation):
      chisq, pval = compare_survival(*inputs)
  
      expected_chisq, expected_pval = expectation
      assert chisq == pytest.approx(expected_chisq)
      assert pval == pytest.approx(expected_pval)
  
imports: import numpy
  from numpy.testing import assert_almost_equal
  import pandas
  from pandas.testing import assert_frame_equal
  import pytest
  from sksurv.compare import compare_survival
  from sksurv.datasets import load_veterans_lung_cancer
  from sksurv.testing import FixtureParameterFactory
  from sksurv.util import Surv
label_desc: Use image node_id 4 for calling a global function with example usage: test_toy_compare_survival(inputs, expectation) without return types